Improvement in motive powers for operating sewing-machines



H. WARREN & c. .H. LUTHER. Improvement in Motive-Power forOperating.Sewing-Machines.

.N ]2g 9g8v Patented July 30, 1872- 0/. FIION-UTH06IMFHIO cam. fosazmwssmacsssj UNITED STATES PATENT OFFICE.

HENRY WARREN AND CHARLES H. LUTHER, OF PROVIDENCE, R. I.

IMPROVEMENT IN MOTIVE POWERS FOR OPERATING SEWING-MACHINES.

Specification forming part of Letters Patent No. 129,998, dated July 30,1872.

Specification describing a new and Improved Sewing-Machine Power,invented by HENRY WARREN and OHARLEs H. LUTHER, of Providence, in'thecounty of Providence and State of Rhode Island.

Our invention consists of a novel and efficient arrangement of a springwinding, holding, regulating, andtransmitting apparatus, for adaptingthe same for application to sewing-machines, all as hereinafterdescribed.

Figure 1 is a front elevation of the apparatus with a part sectioned,and Fig. 2 is a horizontal section taken on the line av 00 of Fig. 1.

Similar letters of reference indicate corresponding parts.

A is a crank-shaft mounted in the housings B, with a drum, C, inclosinga spring, D, fixed loosely on it, said spring being connected at itsouter end to said drum, and at the inner end to the hub E made fast tothe shaft. The face of this drum gears with a small roller, F, byfrictional contact, to transmit the motion through the shaft H andpulley I. K is a disk at one side of the drum, attached to't-he bracketsL, projecting from one side of the frame. M, on the outside, for holdingthe shaft A after the spring has been wound up by a pawl, N, pivoted onthe arm 0 of said shaft. P is a friction-holding disk on the side of thedrum, opposite to the one where the ratchet is arranged. lts hub ispivoted in the ends of the crotched shifting-lever Q, which is pivotedon the bracketR. This disk, being pressed against Said disk has aratchet;toothed hub,

the side of the drum, will stop the machine or slow the motion, asrequired. It also holds the disk while winding up the spring, which isdone by turning the hand-crank T.

The drum A and wheel F may be geared together by teeth instead of byfrictional contact, as preferred; but, when arranged as here shown, thebearings V will be made adjustable toward and from drum A, and providedwith adjusting-screws V, or other equivalent means for adjusting them.The motion will be transmitted to the sewing-machine from the pulley I.

This arrangement affords a simple and efficient apparatus, which may bewound up by a few turns of the crank, and will run a sewing-machine orother light machinery very much longer than the time required to wind

